Capacity: 1200ml

Size/weight: 10×7×26cm/482g

Carton: 61.2×54.5×28cm/0.093m³

QTY: 20pcs

N.W./G.W.: 9.6/11.6kgs

1. Core Concepts and Key Technologies

The 304 insulated stainless steel Tumbler gradient color represents the integration of thermal insulation engineering, corrosion-resistant metallurgy, and advanced surface finishing. While visually distinguished by a metallic blue gradient body paired with a contrasting light blue handle and a clear straw, its functional value lies primarily in controlled heat retention, structural durability, and ergonomic usability.

At the center of this design is double-wall vacuum insulation, a thermal management principle that minimizes heat transfer by eliminating air between two stainless steel layers. In this configuration, conduction and convection are significantly reduced, while radiant heat exchange is limited through surface reflectivity. This allows beverages to remain hot or cold for extended periods without external energy input.

The use of 304 stainless steel as the base material is a deliberate engineering choice. Known for its balanced chromium-nickel composition, 304 stainless steel provides excellent corrosion resistance, mechanical stability, and compatibility with food and beverage contact requirements. These characteristics make it particularly suitable for daily hydration products exposed to temperature cycling, acidic liquids, and repeated cleaning.

The gradient color finish, although aesthetic in appearance, is also a controlled surface treatment process. When properly executed, it does not interfere with thermal performance or material integrity. Instead, it adds functional benefits such as surface protection, improved grip, and resistance to abrasion. In B2B applications, these features support long-term usability rather than purely decorative differentiation.

2. Product Structure, Performance, Materials, and Manufacturing Processes

2.1 Structural Composition

A typical metallic blue insulated tumbler with a contrasting light blue handle is composed of several interdependent components:

Inner vessel: Manufactured from food-grade 304 stainless steel, forming the primary liquid contact surface.

Outer shell: Also stainless steel, providing mechanical strength and supporting surface treatments.

Vacuum insulation layer: A sealed, evacuated gap between inner and outer walls.

Base seal: A welded or crimped closure that maintains vacuum integrity.

Lid assembly: A secure, multi-component structure designed to resist leakage.

Clear straw: Engineered for fluid flow while minimizing thermal exchange.

Ergonomic handle: Color-matched and positioned to optimize load distribution.

Each component is engineered to function as part of a system rather than as an isolated element.

2.2 Material Performance Characteristics

304 stainless steel is selected for its predictable behavior under thermal and mechanical stress. Key performance attributes include:

High resistance to oxidation and corrosion

Neutral interaction with hot or cold beverages

Structural stability across repeated temperature changes

Ease of forming and welding without microstructural degradation

For non-metallic components, material compatibility is equally critical. Handles and lid elements are typically produced from reinforced polymers or elastomers designed to maintain dimensional stability and tactile comfort. Clear straws are often made from BPA-free polymers selected for transparency, impact resistance, and temperature tolerance.

Surface finishes used to achieve gradient color effects must be chemically stable and mechanically bonded to the outer shell. Processes such as controlled powder coating or anodized-style metallic treatments are commonly used, provided they meet food-contact adjacency and durability requirements.

2.3 Manufacturing Workflow

The production of a 304 Insulated Stainless Steel Tumbler follows a sequence of tightly controlled operations:

Deep drawing or spinning of inner and outer shells.

Precision trimming and alignment to ensure concentric wall spacing.

Welding of the base section to create a sealed cavity.

Vacuum evacuation and sealing, often verified through pressure decay testing.

Surface finishing, including polishing and gradient color application.

Injection molding of lids, handles, and straw components.

Final assembly, incorporating torque-controlled fastening.

Functional testing, covering leak resistance and thermal retention.

Consistency at each step is essential to achieve predictable performance across production batches.

3. Factors Influencing Quality and Thermal Performance

3.1 Vacuum Stability

The effectiveness of double-wall insulation depends on long-term vacuum retention. Even minor air ingress can significantly reduce thermal efficiency. Quality control measures focus on weld integrity and sealing precision.

3.2 Lid Security and Sealing Geometry

A secure lid relies on the interaction between rigid structural elements and flexible sealing materials. Dimensional accuracy and material resilience determine whether the lid remains leak-resistant during movement and pressure variation.

3.3 Surface Treatment Durability

Gradient color finishes must resist abrasion, UV exposure, and chemical cleaning agents. Poorly bonded coatings may degrade, affecting both appearance and tactile performance.

3.4 Ergonomic Load Management

The contrasting light blue handle is not purely aesthetic. Its geometry and attachment method influence user comfort and structural longevity. An improperly designed handle can introduce stress points during lifting or transport.

3.5 Thermal Cycling Resistance

Daily use often involves alternating hot and cold beverages. Materials and joints must accommodate expansion and contraction without compromising seals or alignment.

4. Common Questions and Technical Clarifications (FAQ)

Q1: Does the gradient color finish affect insulation efficiency?

When applied correctly, surface finishes do not interfere with the vacuum insulation layer or heat retention performance.

Q2: Why is 304 stainless steel preferred over other grades?

304 offers an optimal balance of corrosion resistance, cost efficiency, and manufacturability for beverage containers intended for daily use.

Q3: Is the clear straw suitable for hot beverages?

Straw materials must be selected for temperature tolerance. High-quality polymers can handle moderate heat, but prolonged exposure to very hot liquids should be evaluated during design.

Q4: How is leak resistance tested?

Testing typically includes inverted holding tests, dynamic agitation, and pressure variation simulations.

Q5: What limits the service life of an insulated tumbler?

Service life is primarily influenced by vacuum retention, seal durability, and resistance to mechanical wear rather than nominal insulation time ratings.

5. Application Scenarios and Industry Use Cases

The metallic blue insulated tumbler with ergonomic handle supports a range of professional and everyday environments:

Office settings: Maintains beverage temperature throughout extended work periods without surface condensation.

Commuting: Secure lids and balanced handles reduce spill risk during movement.

Corporate environments: Gradient color options support internal standardization or functional differentiation.

Shared workspaces: Durable construction withstands repeated daily handling.

Technical and field roles: Provides temperature-stable hydration during inspections or travel.

In each scenario, the tumbler functions as a reusable thermal tool rather than a disposable accessory.

6. Current Trends and Future Development Directions

6.1 Advanced Surface Engineering

Gradient and metallic finishes are increasingly engineered for durability rather than decoration, integrating scratch resistance and tactile optimization.

6.2 Focus on Long-Term Use

Product evaluation is shifting toward lifecycle performance, emphasizing vacuum longevity and repairable components.

6.3 Modular Component Design

Interchangeable lids, straws, and handles allow functional adaptation without redesigning the insulated core.

6.4 Data-Driven Ergonomics

Anthropometric data is being used to refine handle shapes and grip textures for broader user comfort.

6.5 Regulatory and Material Transparency

B2B buyers increasingly require documented compliance with food-contact standards and traceable material sourcing.

Conclusion

The 304 insulated stainless steel tumbler gradient color exemplifies how material science, thermal engineering, and surface technology converge in modern beverage containers. Its performance is determined not by visual elements alone, but by vacuum integrity, material compatibility, and structural precision. When engineered and manufactured with consistency, this category of tumbler delivers reliable temperature retention, leak resistance, and ergonomic usability across daily hydration, commuting, and office environments.